Disintegrating mill



Nov. 1, 1927.

A. LEGGEMANN msmmemwme MILL Fileg Feb. 26, 1927 2 Shoots-Sheet. 1

n n I I l a I m l Nov. 1, 1927. 1,641,183 1 A. LEGGEMANN DISINTEGRATINGM1111.

Filed Feb. 26, 1927 2 Sheets-Sheet. 2

I mentor Azberc Lg emanm Z3 r I ,Ac'ior'ney 35 f or beaters beingrotated pass between the Patented Nov. 1, 1927.

, UNITED STATES I 1,647,183 PATENT-OFFICE.

ALBERT LEGGEMANN, 0F BRUNSWICK, GERMANY.

msmrnena'rmo MILL.

Application filed February 26, 1927, Serial No. 171,312, and in GermanyJanuary 31, 1927.

My invention relates to improvements in disintegrating mills, and moreparticularly in mills of the type inwhich one or more rotary beaterscooperate with a grate in the form of a funnel, the said beaters passingbetween the grate bars and acting on the material placed thereon byimpact. The-object of the improvements is to provide a mill f this classwhich has a high efliciency and 1n which obstruction of the bottom partbythe material being disintegrated is avoided. With this object in viewmy invention con-' sists in providing an abutment at the bottom part ofthe funnel provided by the grate on which the material beingdisintegrated is supported, so that the heaters have a full actionthereon.

For the purpose of explaining the invention an embodiment of the samehas been shown in the accompanying drawing in which the same referencecharacters have been used in all the views to indicate correspondingparts. In said drawing,

'Fig. 1, isa vertical section'of the mill,

Fig. 2, a top plan view thereof with parts broken away for clearerdisclosure, and Fig. 3 is a side view of the abutment at the bottom partof the funnel.

In the example shown in the figures my improved mill consists of twoparallel sections each comprising a rotary shaft 71. haying beaters g, smounted thereon, the said sections having a chute b disposed between thesame. The side walls of the chute are formed of grate bars a, andthehammers said grate bars and into the hopper provided thereby so as toact on the material to be disintegrated.

Referrin now more. partic'ularly to the drawing, t e mill comprises aframe provided with a transverse tapering member 22 and cross-bars o. Onthe said tapering member an elongated head 'w'of tempered steel issupported, and on the cross-bars 'v and the said tapering membersegmental bars 7 are supported, which are connected by grate bars f andcross bars f Above each of the grates f, f a-shaft h is rotatablymounted in bearings a secured to the frame g, and the said shafts areadapted to be rotated bysuitable means such as belt gearings 9'. -Attheir adjacent top ends the segmental bars ,7, are supplemented bysegmental, grates'a, the distance of which from the axes of therespective shafts h is less than the distance between such axes and thecoacting grates f, and which are disposed so as to provide a hopper 6adapted to have the material to be disintegrated delivered into thesame. Further, each millis covered by a segmental wall n having openings0 normally closed by lids p. To eaph of the rotary shafts k a pluralityof arms I arefixed. the length of which is less than the distance of thesegmental grates a from the respective shafts It. On pivot bolts r fixedto the outer ends of the said arms beaters or hammers 8 are rockinglymounted,-

which hammers are adapted to pass between the bars of the grates a.'Thus, upon rotation of the shafts k the hammers or heaters pass into thehopper b where they act on the material to be disintegrated. The die--integrated material .falls through the grates a and on the grates f, 7'whereit is further reduced by the hammers moving across the said grates.So far the disintegrating mill is knownin the art.

In the operation of the mill the material fed into the funnel 6 tends toobstruct the bottom part of the grates, a, so that the action of thehammers or heaters s on the material is interfered with. Therefore Iprovide an" "a. Further, the portions e are supported on the elongatedhead u. Thus the anvil can be readil Jremoved in case of wear andreplace with a new one. The triangular part of the anvil is spaced fromthe bottom part of the grates a, and in the operation of the mill itprovides a rigid sup ort'for the parts of the material falling to t ebottom part of the hopper, so that the heaters or hammers s have astrong disintegrating action.

While in describing the invention refer- .ence has been made to aparticular embodiment of the sametI wish it to be understood that myinvention is not limited to the construction shown in the drawing, andthat variouscha-nges may be made in the neral arrangement of theapparatus an the con.-

struction of its arts without departing from' the invention, t e truescope of which is indicate'd in theappended claims.

I claim:

1, A disintegrating mill, comprising a hopper for the material to bedisintegrated having its bottom in the form of a grate, rotary heatersadapted to pass between the bars of the grate into said hopper, and arigid abutment located above the bottom part of said hopper and spacedfrom the bottom part of said grate.

2. A disintegrating mill. comprising a pair of segmental compartments,parallel shafts rotatably mounted onein each of said compartments,heaters mounted on said shafts, a hopper above said compartments andcommon to both compartments, the side walls of said hopper consisting ofsegmental grates formed with slots located concentrically of said shaftsand having a distance from said shafts such that the outer ends of saidheaters are adapted when being rotated to pass between the same and intosaid hopper, and an elongated anvil above the bottom part of said hopperand having its side walls spaced from the bottom parts of the side wallsof said hopper.

3. A distintegrating mill, comprising a pair of segmental compartments,parallel shafts rotatably mounted onein each of said compartments,heaters mounted on said shafts, a hopper above said compartments andcommon to both compartments, the side walls of said hopper consisting ofsegmental grates formed with slots located concentrically of said shaftsand having a distanc from said shafts such that the outer ends 0 saidheaters are adapted when being rotate to pass between the same andintosaid hop per, and an elongated wedge-shaped anvil disposed at thebottom part of said hopper and spaced from the bottom parts of the sidewalls thereof and formed with laterally projecting arms bearing on saidside walls.

4. A disintegrating mill, comprising apair of segmental compartments,parallel shafts rotatably mounted one in each of said compartments,beaters mounted on said shafts, a hopper above said compartments andcommon to both compartments, the side walls of said hopper consisting ofsegmental grates formed with slots located concentrically of said shaftsand having a distance from said shafts such that the outer ends of saidheaters are adapted when being rotated to pass between the same and intosaid hopper, and an elongated anvil at the bottom part of said hopperand spaced with its side walls from the bottom parts of the side wallsof said hopper, said anvil being removably fixed to the side walls ofsaid hopper.

In testimony whereof I have hereunto set my hand.

ALBERT LEGGEMANN.

